標題:
Math一問~~~~~
發問:
From 2400 electonic components , x of them are chosen at random , of which 3 of them are defective .a ) If the relative frequency of defective electronic components out of the chosen ones is 1/75 , find x .b ) Among the 2400 pieces of electronic components , estimate the number of defective ones based on the... 顯示更多 From 2400 electonic components , x of them are chosen at random , of which 3 of them are defective . a ) If the relative frequency of defective electronic components out of the chosen ones is 1/75 , find x . b ) Among the 2400 pieces of electronic components , estimate the number of defective ones based on the above situation .
最佳解答:
From 2400 electonic components , x of them are chosen at random , of which 3 of them are defective . a ) If the relative frequency of defective electronic components out of the chosen ones is 1/75 , find x . b ) Among the 2400 pieces of electronic components , estimate the number of defective ones based on the above situation . (a) 3/x=1/75 x=3*75 x=225 (b) the number of defective ones =2400*(1/75) =32
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